True or False: Enabling any other type of sort (Field, alphabetic, or Nested) clears the manual sort we create.

This is true. a Manual Sort lets you select a value and move it to the desired position, either by

dragging it in the list or using the arrows to the right.

However, as soon as you choose some other type of sort - be it field, nested, or alphabetic, our

custom created manual sort gets deleted/cleared.

Reference: https://help.tableau.com/current/pro/desktop/enus/sortgroup_sorting_computed_howto.htm